The relationship between temperature and electrical resistance for C30 ordinary concrete (Portland cement concrete) and C30 steel slag concrete is investigated in detail. On the basis of monitoring data obtained from non-stress meters, it was found that in both ordinary concrete and steel slag concrete, the temperate is linearly related to the electrical resistance. To be specific, in ordinary concrete the temperate is inversely proportional to electrical resistance while in steel slag concrete the temperate is proportional to electrical resistance. The above findings can be explained by the principles of non-stress meter and non-stress deformation of concrete in association with least-squares-fitted curve of monitoring data as follows: the temperature is inversely proportional to electrical resistance when the thermal expansion coefficient of concrete aggregate is smaller than the temperature correction (compensation) factor of non-stress meter, and vice versa.
Key words
non-stress meter /
flood control wall /
C30 ordinary concrete /
C30 steel slag concrete /
measurement temperature /
electrical resistance /
coefficient of thermal expansion /
least squares fitting
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 经萱禄, 赵志仁, 王挺正. 混凝土坝应变计观测资料的整理方法[R]. 北京:中国水利水电科学研究院, 1964. (JING Xuan-lu, ZHAO Zhi-ren, WANG Ting-zheng. Method of Sorting Observed Data of Strain Gauge for Concrete Dam[R]. Beijing:Institute of Water Resources and Hydropower Research, 1964. (in Chinese))
[2] 祁立友, 王永亮, 苏向明.桃林口水库大坝应变原型观测资料分析[J].河北水利水电技术, 1999, (1):61-63. (QI Li-you, WANG Yong-liang, SU Xiang-ming. Analysis of Observed Prototype Data of Strain of Taolinkou Reservoir Dam[J]. Hebei Water Resources and Hydropower Engineering, 1999, (1):61-63. (in Chinese))
[3] 张水峰.基于应变计组实测资料的混凝土坝应力分析[D].武汉:武汉大学, 2006. (ZHANG Shui-feng. Analysis on the Stress of Concrete Dam Based on Measured Data by Strain Meters[D].Wuhan:Wuhan University, 2006. (in Chinese))
[4] 彭 虹. 大坝应力、应变监测的几个问题[J]. 水电自动化与大坝监测, 2010, 34(4):42-47. (PENG Hong. Several Questions of Stress Strain Monitoring on Concrete Dam[J]. Hydropower Automation and Dam Monitoring, 2010, 34(4):42-47. (in Chinese))
[5] 薛桂玉, 乔国龙, 杨定华. 江垭碾压混凝土坝无应力变形规律分析[J].水利与建筑工程学报, 2011, 9(3):54-57. (XUE Gui-yu, QIAO Guo-long, YANG Ding-hua. Analysis on Non-stress Deformation of Jiangya RCC Dam[J]. Journal of Water Resources Architectural Engineering, 2011, 9(3):54-57. (in Chinese))
[6] 张进平.大坝监测资料的管理与分析讲义[R].北京:中国水利水电科学研究院, 2012. (ZHANG Jin-ping. Management and Analysis of Dam Monitoring Data[R]. Beijing:China Institute of Water Resources and Hydropower, 2012. (in Chinese))
[7] 黄 杰, 吴胜兴, 沈德建. 不同粗骨料混凝土早期热膨胀系数试验研究[J]. 结构工程师, 2004, 26(3):154-155. (HUANG Jie, WU Sheng-xing, SHEN De-jian. Experimental Study on Thermal Expansion Coefficient of Different Type Coarse Aggregates Concrete at Early Ages[J]. Structural Engineer, 2004, 26(3):154-155. (in Chinese))
PDF(1172 KB)
